Originally Posted by Tax Dude
You get a whole SE package - card, tags, concierge wallet card, certs.
Depends when s/he crossed the 100K threshold since it was officially the 15th that was the cutoff. Could be a gesture in lieu of the full kit. We need a bit more info from the OP to determine this:
When was the flight you crossed 100K taken?
How many status miles have you currently got (including the 10K bonus)?
Is the letter dated?
When did you cross the 75K threshold?